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综合地球物理在内蒙古多伦县核桃坝地区铀矿勘查中的应用

李英宾 张伟 邱崇涛

李英宾, 张伟, 邱崇涛. 综合地球物理在内蒙古多伦县核桃坝地区铀矿勘查中的应用[J]. 地质科技通报, 2024, 43(1): 352-359. doi: 10.19509/j.cnki.dzkq.tb20230281
引用本文: 李英宾, 张伟, 邱崇涛. 综合地球物理在内蒙古多伦县核桃坝地区铀矿勘查中的应用[J]. 地质科技通报, 2024, 43(1): 352-359. doi: 10.19509/j.cnki.dzkq.tb20230281
LI Yingbin, ZHANG Wei, QIU Chongtao. Application of comprehensive geophysics in uranium exploration in the Hetaoba area of Duolun County, Inner Mongolia[J]. Bulletin of Geological Science and Technology, 2024, 43(1): 352-359. doi: 10.19509/j.cnki.dzkq.tb20230281
Citation: LI Yingbin, ZHANG Wei, QIU Chongtao. Application of comprehensive geophysics in uranium exploration in the Hetaoba area of Duolun County, Inner Mongolia[J]. Bulletin of Geological Science and Technology, 2024, 43(1): 352-359. doi: 10.19509/j.cnki.dzkq.tb20230281

综合地球物理在内蒙古多伦县核桃坝地区铀矿勘查中的应用

doi: 10.19509/j.cnki.dzkq.tb20230281
基金项目: 

中国核工业地质局项目 202104-1

详细信息
    通讯作者:

    李英宾, E-mail: 799982826@qq.com

  • 中图分类号: P631;P619.14

Application of comprehensive geophysics in uranium exploration in the Hetaoba area of Duolun County, Inner Mongolia

More Information
  • 摘要:

    核桃坝地区铀成矿条件优越,在该区东部已取得较好的找矿成果,西部尚未取得找矿突破。研究区铀矿化受断裂构造、破碎带控制明显,查明该区断裂构造格架和构造破碎、蚀变带的分布,推断成矿有利区,为进一步挖掘该地区的铀成矿潜力提供地球物理资料。通过音频大地电磁测量、土壤氡测量和地面高精度磁测3种物探方法的联合应用,圈定了土壤氡异常;查明断裂F13北西部断裂呈现NE向和NW向"田"字格排列,断裂F12南东部断裂呈现NE向。断裂F13、F12夹持部位断裂呈现近SN向和NW向;推断构造蚀变、破碎带6处。结合该区铀矿化特征,构造蚀变、破碎带S1、S2、S3、S4,处于断裂交汇、夹持部位,规模较大,且周围分布多个土壤氡异常,异常幅值可达35 000 Bq/m3,为成矿有利地段。经钻探验证,钻孔ZKH24深部发现了构造蚀变、破碎带和富厚铀矿体,后续在S2构造蚀变带内发现了多个工业铀矿孔,并发现了矿体较好的钻孔ZKH7-1,落实了铀矿产地,说明此3种物探方法联合应用在该地区铀矿找矿工作中具有较好的效果,可在该类型铀矿勘查工作中推广应用。

     

  • 图 1  研究区地质简图

    Figure 1.  Geological sketch of geology in the study area

    图 2  核桃坝地区磁法综合图

    Figure 2.  Comprehensive map of ground magnetic measurement in the Hetaoba area

    图 3  核桃坝地区磁异常断裂构造解释图

    Figure 3.  Fault interpretation from magnetic anomaly in the Hetaoba area

    图 4  核桃坝地区土壤氡异常分布图

    Figure 4.  Anomaly map of soil radon in the Hetaoba area

    图 5  Z21Y01线综合物探剖面及地质推断解释图

    Figure 5.  Comprehensive geophysical section and geological interpretation of the Line Z21Y01

    图 6  音频大地电磁反演300 m深度电阻率分布图

    Figure 6.  Resistivity map of audiomagnetotelluric inversion of 300 m depth

    图 7  综合地质解释与钻孔揭露情况对比图

    Figure 7.  Comparison of comprehensive geological interpretation and borehole

    表  1  岩石物性参数测量结果

    Table  1.   The rocks physical properties measurement results

    岩性 组数 电阻率/(Ω·m) 组数 磁化率/10-5SI
    变化范围 几何平均值 变化范围 几何平均值
    流纹岩 30 183~3 900 945 31 5~25 12.5
    凝灰岩 31 266~3 326 902 30 4~32 13.2
    流纹斑岩 31 1 451~5 659 2 544 34 28~1430 316.8
    凝灰岩(蚀变、破碎) 30 159~967 380
    流纹岩(蚀变) 30 208~1 530 603.2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-05-22
  • 录用日期:  2023-09-28
  • 修回日期:  2023-09-27

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